各向异性油藏注水开发布井理论与方法

油藏各向异性对于开发井网具有破坏和重组作用，致使井网的生产效果难以把握，严重影响油藏原油的产量和采收率，其开发井网的布置是一大难题。布井的关键在于突破传统的正多边形井网形式，建立变形井网。利用坐标变换将各向异性油藏变成等价各向同性油藏，分析了注水开发井网的变形机理。为了避免井网破坏，注采井排必须与最大渗透率方向（裂缝方向）平行或垂直；为了优化井网的油藏开发效果，井网注采单元的几何参数（井距和排距）由各向异性渗透率主值计算得到，提供了定量计算公式。

Well location in water-flooding anisotropic oil reservoirs

The anisotropy of reservoirs has destroying and reconstructing effects on the well networks.The indetermination of the network production effects severely affects the oil production rate and the oil recovery. The well location for development of the anisotropic reservoirs is always a big difficulty.The key to deploying wells is to breakthrough the traditional normal polygonal well network and to establish a deformed well network.The anisotropic reservoir is changed into an equivalent isotropic reservoir by coordinate transform.In order to avoid the network destruction,the injector-producer well lines must be parallel or perpendicular to the principal direction of the anisotropic permeability(i.e.the fracture direction),and in order to optimize the reservoir development effects of the well network,the geometric parameters of the injector-producer unit are calculated from the principal values of the anisotropic permeability.